Design and property study of a new type centrifugal crusher wear block

Abstract

A new type wear block made of medium carbon low alloy steel was designed to improve the service of a centrifugal crusher. A reasonable casting technology was chosen and ViewCast software was used to simulate the solidification process, then the location of the defeats was predicted, the scheme was optimized and the production verification was carried out. Annealing, quenching and tempering of wear resistant block was carried for performance testing. The observed metallographic microstructure indicates that it was organized as a strip martensite and a small amount of needle martensite after heat treatment. The analysis of mechanical properties indicates the hardness was 54.8HRC, the tensile strength was 1325MPa, the impact energy of V-notch and no notch was 15.7J and 142.7J respectively. Analysis of tensile and impact fracture scanning electron microscopy indicates that the fracture mechanism is subject to eutectic fracture. The performance test results show that the new type centrifugal crusher wear block can meet the requirements of the actual condition.

Keywords:

• Centrifugal crusher wear block
• Medium carbon low alloy steel
• Numerical simulation
• Heat treatment